基于GRACE重力卫星数据的黄河流域水储量变化研究

Research on Yellow River Basin Water Storage Change Based on GRACE Gravity Satellite Data

摘要: 采用GRACERL05 Level－2版本60阶重力场球谐系数模型，反演2004～2010年黄河流域水储量变化的时空分布特征，结果表明，黄河流域水储量变化具有明显的季节和周年变化特征，2004～2010年，黄河流域水储量整体以0.25 mm/a的速率下降，其中2006年1月～2007年5月，水储量减小速率较大，约为1.6 mm/a。将这一结果与GLDAS水文模型的计算结果进行比较，两者具有强相关性，相关系数为0.81。

Abstract: Using the GRACE RL05 Level-2 60 rank gravity field spherical harmonic coefficient model,it rechecks the space-time distribution of Yellow River basin water storage change from 2004 to 2010.The results show that the Yellow River basin water storage have obvious seasonal and annual changes.From 2004 to 2010,the total water storage decreased at a rate of 0.25 mm/a, and the rate of reduction of water reserves from January 2006 to May 2007 was relatively large,which was approximately 1.6 mm/a.Comparing the calculation results with the GLDAS hydrological model’s, it shows this two results have obvious correlation,the correlation coefficient is 0.81.